There are many ongoing feuds between China and Japan, some potentially dangerous, such as the dispute over some islets in the China Sea, as well as long-standing sores, dating back to Chinese invasions, massacres and occupations of territories in the days of Japanese militarism. But fortunately there are also very strong commercial ties. According to WTO statistics (WTO) the China, since 2007 and for seven consecutive years has been the main trading partner of Japan.
For example, Japan imported $2013 billion in goods from China in 181; in second place there is the European Union with 78 and the USA in third place with 72. And the story is not very different as far as Japan's exports are concerned: if the United States is in first place (134 billion dollars), China is second (129), followed by the European Union (72).
Adding exports and imports (trade) China is by far in first place. And this despite the fact that Chinese imports from Japan decreased in 2013, due to political frictions that triggered an informal boycott by Chinese consumers.
In terms of realpolitik, however, the trade ties are so strong that it is difficult to think that the disputes between the two countries could lead to real ruptures.
